Plate valve



may s, i928. 1,669,361

. G. G. TUTTLE PLATE VALVE Filed Nov. 5 1926 JNVENToR.

R r/ L C G1101/ @$71 ffe. 8% .Ai/W

H175 AT-ORNEY ytion of a valve rplate showing lform of the inventioin` Patented May 1928.

[PATENT .ori-"ica GEOVER G. TUTTLE, `oErHILLI"simmer; NEW JERSEY, `.asSiegivcin "ro INGEEsoiiL-RAND COMPANY, oF JERSEY CITY, NEW JERSEY,` A CORPORATION "0E NEW JERSEY.

PLATE vALvE. v

Appnationfaled November 5"; 1926. seriaijNo. 146,378.

This invention relates to valves ,of the ,type uscdin compressors, pumps and the like for controlling the admission of air*y into and from a .con'ipressorL More, particularly, it relates to a flexible `*type of valve 1n which the valve is opened jand. closed by the fluid which it is is adapted to control either When used as an inlet or al discharge valve.

The objects of the invention are to obtain a maximum port area and valve lift, to prevent friction between the various elements of the valve and to reduce the chances of breakage of the valve plate to a minimum.

Other objects will be in part .obvious and in part pointed out hereinafter.

The invention is illustrated in oneof its preferred forms in the accompanying drawings, in Which n n Figure l is a top' plan view With a portion of the stop plate brokenV away',

Figure 2 is a sectional elevation taken through Figure 1 on` theline 2;-2 looking in the direc-tion of the arrows,

Figure 3 is an elevation partly in sectionk taken through Figure 1 on the linek 3 8 looking` in the direction of'the-y arrows,a`nd

\ Figure et is a sectional elevation ofadpolra` modified Referring to the drawingsfthe .invention comprises a circular valve'seat A having a flange B on its perimeter to cooperate with la seat (not. shovvn) ofthe con'ijpressor or similar machine to which the valve' may be applied. The valve seat A in this Vinstance is provided' With'a series of parallel portsfC which extend across the valve seat and terminate with their ends at points near the f edge' of the valve seat.-

The ports C arie ce1`itr`olledv by a valve plate designated generally by D andcomprising in Vthis instance a central body Vportion* F and laterallyfezrtending fingers G disposed on opposite sides of the body por# tion F. The fingers G are somewhat Wider than theports C which.they-control@ to obtain asubstantial contact between the' fingersl somewhatshorter and of less Width thanthe lingers G ofthe valve plate so that a Vsubstanti-aharea of the fingers G will be exposed to the flu-id exhausted through the valve for closing said Valve plate. f

The .inner surface L of the `stop yplateI-l is int-his instance 'of convex form to enable 'the lingers [G to Contactgradually with the arms l upon opening, thus rendering the valve practically noiseless in operation.

ln .the present instance the stop `plate is provided with lateral projections O at .its

Y ends which seat on the valveseat A. .The

stop plate H is preferably secured to the valve seat A by means of screws P. By thus forn'iing the projections O on the stop plate, the central body portion J of said stop plates is removed somewhat from thebody portion F of the stopy plate, so that they valve plate as a Whole -may `reciprocate somewhat between the stolippl-ate-andthe ,valve seat. f

lI-Ieretofore invalves of the type lin which the fiexiblevlingers have been employed for f con-trolling the ports, considerable. expense andy delay has. beeny occasioned by the break. age ofthe flexible'lingers.l -v'lo overcome this undesirable feature in the `present invention, az stra-p Qiisdisposed on theou'ter surface of. the body portion yJ to reinforce the valve plate at this point. The strap QImay be rigidly secured to the valveplate by' means ofy rivets R. The strap- Q in thepresent instance ispermitt'ed to" extend into a longif present`r instance consists of rigid;` bars U havingfhub' portions V through which; the rivets R yextend for *clamping the barsU to'gthe` body portionzF of' kthevalve plate D. Extending from opposite' sides of the hub portion` Y are armsv \V,athe"upper surfaces*` X ofWl'ic-h are" adapted toV lie in the same 6 transverse plane as the seating vsurf'aeeof.A the valve seat "whenrthe valvejp'late is closed, In this -way the' fingers 'Gr adequately supported on their inner side to preventithe back pressurel acting vagainst"the outerl surnection with the face of the lingers from pressing or bending the portions of the lingers G which are un-v supported by the valve seat into the ports C. It will be noted however thatvthe lingers Gr may move freely in an Aoutwardly direction independently of the arms W. d

In order to insure the prompt return of the valve plate D to its seat, coil springs Y are interposed between the valve plate and the stop plate. ln the present instance the coil'springs Y are disposedin sockets Z in the stop. plate Hwherebyone end of the springs is held against transverse movement with respect to the stop plate. The opposite ends of the springs Y are'held against similar movement by the heads of the rivets R. Preferably, plates c are clamped between the heads I) of the rivets and the strap Q to form spring seats for the inner ends of the springs Y.

V The advantages of the present invention reside chiefly in the fact that a wide port area may be obtained and that friction be tween the movable valve plate and the stationary associated elements has been practically eliminated. The only-.point of contact between the movable and stationary elements of the valve being that of the seating surface of the valve plate and the cooperating surface of the .valve seat. As .will be observed, there are no pins or other equivalent means for guiding the valve and the valve plate merely lioats between its seat and the stop plate. Owing to the fact that the valve lingers G are suitably supported along their longitudinal axes, bending or buckling of the lingers has been entirely eliminated, thus enabling` the valve plate to seat squarely on the seat A and forma liuid tight contact therewith. i

V.In the modification illust-rated in Figure Ll, a strap (Z, similaiin some respects to the .strap Q in the preferred modification, is provided on its. inner surface with a series of transverse grooves e to accommodate individual valve lingers for controlling the ports C. The valve lingers Vf in this instance are held against oscillation about the rivets R by the grooves @and are secured to the strap cl in the'manner described in convpreferred modilieation. I claim zV A 1. A plate valve comprising a valve seat having ports, each of said portsextending across the valve seat and terminating at opposite ends near the edge of the valve seat, a valve plate controlling the ports, said valve plate comprising a body portion and :oppositely extending fingers, a stop plate for the valve plate, and springs forclosing and guiding the valve plate. v

2. A plate valve comprising a valve seat having a series of ports extending across the valve seat and with opposite ends to points near the edge of the valve seat, a valve plate controlling` the ports, said valve plate comprising a body portion and oppositely extending lingers, a stop plate for the valve plate seated on the valve seat and contactingtherewith only atits ends, springsfor Aclosing and guiding the valve plate, and reciprocabl-e means for supporting the valve plate intermediate the ends of the lingers.

3. A plate valve comprising a circular valve seat having a series of parallel ports, the opposite ends of each port extending to points near the edge ofthe valve seat, a valve plate controlling the ports, said `valve plate comprising a body portion and oppositely entendinglingers, a stop plate for the valve plates, said stop `plate having a recess to permit limited vreciprocation of the body portion ofthe valve plate for opening the ports along their entire length, said recess being of greater length than the body portion rto prevent contact therebetween, laterally extending arms on the stop plate to act as abutments for the lingers of the valve plate, the inner surfaces of the stop plate being convexlateral projections at the ends of the body portion to seat on the valve seat, sprinos between the stop plate and the valve plate for closing the valve plate, and means carried by the valve plate for reinforcing said valve plate intermediate the ends of the lingers.

4. A plate valvev comprising a valve seat having ports, a valve lplate controlling the ports, said valve plate comprising a body portion and oppositely extending lingers, a stop plate for the valve plate secured to the valve seat, springs for closing the valve plate, and means secured to the body portion for preventing flexion of the rlingers in one direction.

5. Aplate valve comprising a valve seat having ports, a. valve plate controlling the ports, said valve plate comprising a body portion and oppositely extendinglingers, a stop plate for the valve plate secured to the valve seat, springs for closing the valve plate, and rigidhieai'is secured to the body portion of the valve plate and reeiprocable therewith for preventing liexion of the lingers in one direction when the valve plate is in its closed position.

6. A plate valve comprising a valve seat havinga series of parallel ports extending across the valve seat and terminating with their opposite ends at points near the edge of the valveseat, a valve plate controlling the ports, saidvalve plateI comprising a body portion andoppositely disposed lateral lingers, a stop plate for the valve plate having a recess to permit the valve plate to reciprocate between the valve seatand the stop plate, arms on the stop plate lying in the saine longitudinal plane as-the lingers, the inner surface of the stop `plate being convex, means secured to the body portion support- CTI ing the lingers along their longitudinal axes to maintain all portions of the fingers in the same transverse plane when the valve plate is in its 'closed position, said means being out of Contact with the fingers during the Open position of the valve, and springs between the `valve plate and the stop plate for closing and guiding the valve plato.,

7. A valve plate comprising a Valyeseat having a series of parallel ports, ayalve plate eontroiling the ports,said Valve plate con'iln-ising a body portion and a plurality of oppositely disposed lingers, a stop plate for the valve plate secured to the valve seat and contacting therewith only at its ends, said stop plate having a recess to permit reeiprocation of the entire valve plate, arms on the stop plate lying in the same longitudinal plane as the fingers, the' inner surface oi. the stop plate being convex to permit the ingers to open to Wider limits than the body portion ol the valve plate, a strapon one side of the Valve plate to reinforce the body portion, bars on the opposite side of the valve plate to support the fingers along their longitudinal axes, means for securing the strap and the bars to the body portion, and springs for closing and guiding the valve plate.

In testimony whereof I have signedV this specification.

Gnovnn G. rrtnrrnn. 

